How to Make Calls Over WiFi on iPhone and Android

What is WiFi Calling?

WiFi calling lets your phone place and receive regular phone calls over a Wi‑Fi network instead of using the cellular voice network. On many phones, the call still shows up as a normal dialed call on the dialer and transmits your caller ID to the person you call. Some carriers provide built‑in WiFi calling that routes your voice through carrier servers. Other options include third‑party VoIP apps that place calls over data or Wi‑Fi to real phone numbers.

Key things to understand:

• WiFi calling uses data, not cellular minutes. That helps when you have weak or no mobile signal but a working Wi‑Fi connection.
• Carrier WiFi calling and VoIP apps look similar to the user but work differently under the hood. Carrier WiFi calling authenticates with your mobile provider and can hand calls back to the cellular network; VoIP apps send audio over the internet and connect to phone numbers through VoIP gateways. See the differences in more depth in our guide to VoIP phone services explained.
• Emergency calling rules vary. Carriers generally require an emergency address for 911/112 routing when you enable WiFi calling. Make sure that address is accurate.
• WiFi quality matters. Low latency and stable bandwidth produce clearer voice and fewer dropouts.

If you want an alternative to built‑in WiFi calling—especially for international calls—VoIP apps let you call landlines and mobiles in 200+ countries over Wi‑Fi or mobile data. Later in this article I’ll mention an example service and how it compares.

How to Enable WiFi Calling on iPhone

Follow these steps to enable carrier WiFi calling on an iPhone (iOS 13+; UI may vary slightly by iOS version):

1. Open Settings.
2. Tap Phone.
3. Tap Wi‑Fi Calling.
4. Toggle on Wi‑Fi Calling on This iPhone.
5. Confirm or enter your emergency address for 911 services. The carrier uses this address when routing emergency calls over Wi‑Fi.

After you enable it, the status bar may show “Wi‑Fi” or “Wi‑Fi Calling” when the phone routes calls over Wi‑Fi. If you don’t see the option, check these items:

• Carrier support: Not every carrier or plan supports WiFi calling. Check your carrier’s help pages or contact support.
• Updated software: Install the latest iOS update. Apple and carriers periodically update Wi‑Fi calling behavior.
• Active SIM and cellular account: Wi‑Fi calling ties to your phone number and SIM. Make sure your SIM is active.
• Region restrictions: Some countries place regulatory limits on Wi‑Fi calling.

If you want to make a call using Wi‑Fi right now for testing, call a friend or your voicemail once you enable the setting. The iPhone routes the call automatically depending on signal strength and carrier preferences; you don’t dial differently. For more on app‑based alternatives that use Wi‑Fi without relying on your carrier, see our guide to free online video calling platforms and VoIP services.

How to Enable WiFi Calling on Android

Android settings vary by make and model, but the steps are similar. Use these general instructions and the example paths for popular manufacturers.

General steps:

1. Open Settings.
2. Tap Network & internet or Connections (name varies).
3. Tap Mobile network or SIM & network.
4. Look for Wi‑Fi Calling and toggle it on. You may need to select the SIM for dual‑SIM phones.
5. Enter your emergency address if prompted.

Examples:

• Samsung (One UI): Settings > Connections > Wi‑Fi Calling > enable.
• Google Pixel (stock Android): Settings > Network & internet > Mobile network > Advanced > Wi‑Fi Calling.
• OnePlus / OxygenOS: Settings > Wi‑Fi & internet > SIM & network > Wi‑Fi Calling.

Android phones often let you pick a preference: Prefer Wi‑Fi, Prefer Cellular, or Use Cellular When Available. Choose Prefer Wi‑Fi if you want the phone to use Wi‑Fi whenever it provides adequate coverage.

If you can’t find Wi‑Fi calling:

• Confirm carrier support and that your plan includes it.
• Install system updates.
• Ensure the phone’s region and carrier settings match your SIM. Some unlocked phones require carrier provisioning to enable Wi‑Fi calling.
• For VoIP apps, permissions for microphone and background data must be allowed.

For step‑by‑step troubleshooting and tips covering both iPhone and Android, skip to the Troubleshooting section below.

Benefits of WiFi Calling

WiFi calling offers several practical advantages for everyday use and travel.

1. Better indoor coverage
   If your house, office, or building has weak cellular signal but a solid Wi‑Fi connection, WiFi calling gives you reliable voice service. The phone switches automatically when Wi‑Fi provides better quality.

2. Fewer dropped calls in low‑signal areas
   Phones often hand calls between Wi‑Fi and cellular without user intervention, reducing dropouts when you move around the home or office.

3. Cost control for some international calling needs
   Carrier WiFi calling typically bills calls like regular calling minutes, so it may not lower international charges. For lower international rates and per‑second billing, use a VoIP service that places calls over Wi‑Fi to landlines and mobiles. For example, some apps charge from $0.02/min to call the US and $0.08/min to call India, with small credit packs and no registration required. If you make frequent international calls, see our guide on how to make international calls for more options.

4. Works with normal phone numbers
   WiFi calling keeps caller ID and the standard dialer experience. The person you call sees your regular phone number rather than an app ID.

5. No need for a special app (carrier WiFi calling)
   Built‑in WiFi calling does not require the other person to install anything. You use the phone’s dialer and your normal contacts.

6. Backup option for travel or roaming
   When roaming, some carriers support Wi‑Fi calling without international roaming charges; check your carrier policy. Alternatively, a VoIP app with competitive rates can let you call home while avoiding expensive roaming voice minutes.

If you need more advanced VoIP features—virtual numbers, multiple outbound caller IDs, or free virtual phone numbers—you can explore options in our guides to virtual phone numbers and free virtual phone numbers.

Troubleshooting WiFi Calling Issues

If WiFi calling does not work or call quality suffers, try these targeted fixes.

Problem: WiFi calling option missing

• Confirm your carrier and plan support WiFi calling. Contact carrier support if unsure.
• Install any carrier settings update: Settings > General > About (iPhone) or look for carrier updates in system settings on Android.
• For unlocked phones, ensure the device is provisioned for the carrier.

Problem: Calls drop or audio stutters

• Check Wi‑Fi signal strength and latency. Run a speed test; aim for low latency (<50 ms) and at least 100–200 kbps per call.
• Use the 5 GHz band if your router supports it and the phone is close to the router; 5 GHz typically reduces interference.
• Reduce network congestion: pause large downloads or streaming on the same network during calls.
• If your network uses strict NAT or firewall rules, SIP/RTP traffic for third‑party VoIP apps may struggle. Disable SIP ALG on your router or consult the VoIP app’s support for recommended ports.

Problem: WiFi calling works on one network but not another

• Some public Wi‑Fi networks block VoIP ports or peer‑to‑peer traffic. Try a different Wi‑Fi network or use a mobile data connection.
• VPNs and proxies may interfere. Temporarily disable VPN to test.

Problem: Emergency address or 911 routing issues

• Verify the emergency address you entered is correct. Update it if you change locations.
• If WiFi calling fails to route emergency calls properly, disable WiFi calling until you can resolve the address issue and use cellular calling if available.

Problem: Outbound caller ID wrong or masked

• Carrier Wi‑Fi calling usually preserves your phone number. If it does not, confirm the phone and SIM are provisioned.
• For VoIP apps, caller ID settings depend on the service. Some services support presenting your mobile number; others show a registered VoIP number. For help with caller ID and virtual numbers, see our virtual phone numbers guide.

Problem: App‑based calls fail while carrier WiFi calling works

• Check app permissions (microphone, background data).
• Update the app to the latest version.
• If the app requires specific network ports (SIP/RTP), router or network security may block them.

Quick diagnostic checklist

• Toggle Airplane Mode on/off to reset radios.
• Restart the phone.
• Reset network settings (Settings > General > Reset > Reset Network Settings on iPhone; Android location varies). This removes saved Wi‑Fi networks, so reconnect afterward.
• Try a different Wi‑Fi network or mobile data to isolate the issue.
• Contact your carrier if built‑in Wi‑Fi calling still fails.

If you want a low‑friction alternative to carrier Wi‑Fi calling—an app that places calls over Wi‑Fi or mobile data to real phone numbers—look for services that offer per‑second billing, low per‑minute rates for international calls, and no expiration on credits. Those options avoid carrier provisioning and can work across networks where carrier Wi‑Fi calling is unavailable.

Frequently Asked Questions

What is wifi calling iphone?

Wi‑Fi calling on iPhone is a carrier feature that lets your iPhone place and receive regular phone calls over a Wi‑Fi network instead of the cellular network. You enable it in Settings > Phone > Wi‑Fi Calling and enter an emergency address for 911 routing.

How do I call over wifi android?

On Android, open Settings > Network & internet (or Connections) > Mobile network, then enable Wi‑Fi Calling. Exact menu names vary by manufacturer (for example, Samsung: Settings > Connections > Wi‑Fi Calling). The phone uses Wi‑Fi instead of cellular voice when the setting is active and the network quality is better.

Can I call over wifi iphone without a SIM?

Most carrier Wi‑Fi calling features require an active SIM and carrier account because the service ties to your phone number. You can use third‑party VoIP apps to make phone calls over Wi‑Fi without a SIM, as those apps route calls over the internet to regular phone numbers.

How do I call through wifi iphone for emergency services?

When you enable Wi‑Fi calling on an iPhone, the phone asks for an emergency address that the carrier uses to route 911/112 calls. Keep that address current. If your Wi‑Fi calling setup does not support accurate emergency location, use a cellular connection or call from a landline.

Is i phone wifi calling free?

Wi‑Fi calling itself does not always change your billing. Carriers typically bill Wi‑Fi calls the same as regular minutes. If you want lower costs for international calls, use a VoIP calling app that charges per minute or per second with specific low rates.

How can I make calls over wifi without the carrier feature?

Install a VoIP calling app that places calls to phone numbers over Wi‑Fi or mobile data. Those apps often sell small credit packs, price international minutes individually, and avoid carrier provisioning. Check app rates, per‑second billing, and whether the service requires registration.

Telvio: an option for Wi‑Fi calling and cheap international calls

If you need a simple VoIP option to make phone calls over Wi‑Fi to international numbers, Telvio is a mobile app for iPhone and Android that calls real phone numbers in 200+ countries over Wi‑Fi or mobile data. Telvio uses per‑second billing and offers rates from about $0.02/min to the US and $0.08/min to India, small credit packs (Starter $1.99, Standard $4.99, Pro $9.99), credits that never expire, and no registration required for quick testing (you get 1 free minute on first install). Use a VoIP app like Telvio when carrier Wi‑Fi calling is unavailable or when you want lower international rates. If you need background reading on related tools, see our guides to VoIP phone services explained, virtual phone numbers, and how to make international calls.